disp: msm: sde: program the start window based on "EPT_FPS"

Introduce a new connector property called “EPT_FPS” for the cmd
mode panels. User space will set the “EPT_FPS” based on the
intended content fps, relative to the last retire fence timestamp
as calculated by Surface flinger. Program start window based
on the Expected Present Time fps.

Change-Id: I24b93e0f941af9fb2422b2484328254d04a1acbe
Signed-off-by: Shirisha Kollapuram <quic_kshirish@quicinc.com>
Signed-off-by: Veera Sundaram Sankaran <quic_veeras@quicinc.com>

msm/msm_drv.h

@@ -248,6 +248,7 @@ enum msm_mdp_conn_property {
 	CONNECTOR_PROP_SET_PANEL_MODE,
 	CONNECTOR_PROP_AVR_STEP_STATE,
 	CONNECTOR_PROP_EPT,
+	CONNECTOR_PROP_EPT_FPS,
 	CONNECTOR_PROP_CACHE_STATE,
 	CONNECTOR_PROP_DSC_MODE,
 	CONNECTOR_PROP_WB_USAGE_TYPE,